Iran has issued an emergency notification effectively shutting down its national airspace to nearly all flight operations, according to data from FlightRadar24 cited by Reuters.

The Notice to Air Missions (NOTAM) restricts the use of Iranian skies to a narrow subset of international flights that must receive explicit authorization from Iranian civil aviation and military authorities.

Flight tracking platforms showed a dramatic "emptying" of the airspace over the Islamic Republic and neighboring Iraq late Wednesday night.